From: Patrick Hurley <phurley@...>
Date: 2005-04-01T22:17:49+09:00
Subject: Re: && Syntax

On Apr 1, 2005 6:29 AM, Lyndon Samson <lyndon.samson@gmail.com> wrote:
> Yes, I'm a rube-noob
> 
> -- ok
> if 1 == 1 &&
>    2 == 2
>   puts "TRUE"
> end
> 
> -- syntax error
> if 1 == 1
>    && 2 == 2
>   puts "TRUE"
> end
> 
> The second form is more convienient as you can easily comment out the
> line, but it causes a syntax error.
> 
> I guess the interpreter need to know where the conditional finishes
> and the statements begin?
> 

Ruby has a very relaxed parser -- that often (unlike C/Java/etc) uses
EOL to delimit expressions. If the parser scans an obvious hanging
statement (like the &&) it will determine that the expression spans to
the next line. You can use the \ to force the span. If you are after a
format that allows for easy commenting out of lines try:

if expr &&
   expr &&
   expr &&
    true
 p true
end

Patrick